1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Implements a dummy match to allow attaching comments to rules
4 *
5 * 2003-05-13 Brad Fisher (brad@info-link.net)
6 */
7
8 #include <linux/module.h>
9 #include <linux/skbuff.h>
10 #include <linux/netfilter/x_tables.h>
11 #include <linux/netfilter/xt_comment.h>
12
13 MODULE_AUTHOR("Brad Fisher <brad@info-link.net>");
14 MODULE_DESCRIPTION("Xtables: No-op match which can be tagged with a comment");
15 MODULE_LICENSE("GPL");
16 MODULE_ALIAS("ipt_comment");
17 MODULE_ALIAS("ip6t_comment");
18
19 static bool
20 comment_mt(const struct sk_buff *skb, struct xt_action_param *par)
21 {
22 /* We always match */
23 return true;
24 }
25
26 static struct xt_match comment_mt_reg __read_mostly = {
27 .name = "comment",
28 .revision = 0,
29 .family = NFPROTO_UNSPEC,
30 .match = comment_mt,
31 .matchsize = sizeof(struct xt_comment_info),
32 .me = THIS_MODULE,
33 };
34
35 static int __init comment_mt_init(void)
36 {
37 return xt_register_match(&comment_mt_reg);
38 }
39
40 static void __exit comment_mt_exit(void)
41 {
42 xt_unregister_match(&comment_mt_reg);
43 }
44
45 module_init(comment_mt_init);
46 module_exit(comment_mt_exit);
47
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.